# (a) AM radio signals have frequencies between 550 kHz and 1600 kHz and travel with a speed of 3.0...

## Question:

(a) AM radio signals have frequencies between 550 kHz and 1600 kHz and travel with a speed of {eq}\rm 3.0 \times 10^8 \ m/s {/eq}. What are the wavelengths of these signals?

(b) On FM the frequencies range from 88 MHz to 108 MHz and travel at the same speed. What are their wavelengths?

## The Speed of Light:

Light is an electromagnetic wave and travels with the speed of {eq}3 \times 10^8 \ m/s{/eq}. The oscillating electric and magnetic fields produce the electromagnetic wave. For an electromagnetic wave, a medium of travel is not necessary, unlike the sound wave. The speed of light is constant. It is proportional to the product of frequency and wavelength.

## Answer and Explanation: 1

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View this answer**(a)** The relationship among the speed of light {eq}(c=3\times10^8\, m/s)
{/eq}, the frequency *f*, and the wavelength {eq}\lambda
{/eq} is

{eq}c=f\lam...

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Chapter 8 / Lesson 19What is a photon? Learn about photon, photon emission and the properties of photon wavelengths, and delve into the complexities of photon energy.

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